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Question Video: Identifying the Incorrect Method of Removing Water from the Body Biology

Which of the following is not a method of removing water from the body? [A] Shedding skin [B] Sweating [C] Urinating [D] Exhaling

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Video Transcript

Which of the following is not a method of removing water from the body? (A) Shedding skin, (B) sweating, (C) urinating, or (D) exhaling.

This question is asking us to select the response that is not a method of removing water from the body. So we can expect that three of the choices will be methods of removing water. And we’re looking for the one that is not. So we’ll start by identifying what is being removed by each of these methods described. And at the end, we’ll select the answer choice that does not remove any water.

Shedding skin is what happens to the outer layer of our skin cells at the end of their life cycle. These cells can be rubbed off by clothing and furniture, washed off when we bathe, or simply fall off without us noticing. Sweating is an excretory process carried out by the sweat glands in our skin. Our sweat consists mostly of water, but it also contains urea, salts, and many other chemicals. Urinating is the process of releasing urine from the bladder. Urine is filtered from the blood by the kidneys. It’s mostly water, and it contains urea, salts, and other soluble wastes produced by our body. Exhaling is how our lungs remove gaseous wastes from our bodies. We mostly exhale carbon dioxide, but some water also evaporates from the moist surfaces within our lungs. So sweating, urinating, and exhaling are all different methods of removing water from the body, but shedding skin is not.

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